Computer
The Computer Defined
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| U Webset |
Electronic device Converts data into information.
Modern computers are digital.
Two digits combine to make data.
Older computers were analog.
A range of values made data .
Computers for Individual Use.
Desktop computers or Microcomputer.
The most common type of computer
Sits on the desk or floor Performs a variety of tasks
Workstations Specialized computers.
Optimized for science or graphics.
More powerful than a desktop.
Notebook computers.
Small portable computers.
Weighs between 3 and 8 pounds.
About 8 ½ by 11 inches.
Typically as powerful as a desktop.
Can include a docking station .
Tablet computers.
Newest development in portable computers
Input is through a pen
Run specialized versions of office products.
Newest development in portable computers
Handheld computers.
Very small computers
Personal Digital Assistants (PDAs)
Note taking or contact management
Data can synchronize with a desktop
Smart phones Hybrid of cell phone and PDA Web surfing, e-mail access
Computers for Organizations
Network servers Centralized computer
All other computers connect, Provides access to network resources Multiple servers are called server farms Often simply a powerful desktop
Mainframes
Used in large organizations
Handle thousands of users
Users access through a terminal
Minicomputers
Called midrange computers
Named mini in 60s due small size at that time
Power between mainframe and desktop Handle hundreds of users Used in smaller organizations Users access through a terminal
Supercomputers
The most powerful computers made
Handle large and complex calculations
Process trillions of operations per second
Found in research organizations
Computers in Society
More impact than any other invention Changed work and leisure activities Used by all demographic groups Computers are important because: Provide information to users Information is critical to our society
Managing information is difficult
Computers at home
Many homes have multiple computers
Most Pakistani homes have Internet
Computers are used for
o Business
o Entertainment
o Communication
o Education
Computers in education
Computers in education
Computer literacy required at all levels Computers in small business
Makes businesses more profitable
Allows owners to manage Computers in industry
Computers are used to design products Assembly lines are automated
Computers in government
Necessary to track data for population
o Police officers
o Tax calculation and collection Governments were the first computer users
Computers in health
Care Revolutionized health care
New treatments possible
Scheduling of patients has improved
Delivery of medicine is safer
We will see all about computers step by step...
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